Thinking the fire at a local fertilizer plant was relatively innocuous a Waco, Texas father pulled up a quarter mile away with his son to observe the event.
He told his son he expected the buildings at the plant to collapse, but instead a massive explosion went off, which he caught on tape.
You can see the footage on youtube.com here: MASSIVE EXPLOSION IN TEXAS
The explosion happens about midway through the 55 second tape.
Another view can be seen here: MASSIVE EXPLOSION IN TEXAS II